Figure 6

Growth curve and quantitative analysis of Salmonella Typhimurium exposed to various concentrations of nanocomposites. (a) Bacterial growth curve exposed to SWCNTs-Ag using optical density measurements. (b) cfu/mL of surviving bacteria upon exposure to SWCNTs-Ag. (c) Growth curve upon exposure to pSWCNTs-Ag using optical density measurements. (d) Quantification of bacteria upon exposure to pSWCNTs-Ag. Bacteria were grown in LB broth containing various concentrations of nanocomposites and all the cultures were incubated at 37°C with shaking at 250 rpm and the optical density measurements at 600 nm (OD600) and cfu/mL counts were done at 0, 4, 8, 16 and 24 h. The results are means of three experiments, with p ≤ 0.05 indicating significant * differences, or p ≤ 0.01 indicating highly significant ** differences. Error bars represent standard deviations determined from at least three replicates.